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CVE-2018-5541

24
FAUCET Score

CVE-2018-5541 describes a denial-of-service vulnerability in F5 BIG-IP ASM versions 13.0.0-13.1.0.1, 12.1.0-12.1.3.5, 11.6.0-11.6.3.1, and 11.5.1-11.5.6. An unauthenticated attacker can trigger excessive CPU usage in the BIG-IP ASM bd process by sending HTTP requests with an unusually large number of parameters. This vulnerability has a CVSSv3 score of 7.5 (HIGH), indicating a network-based attack with low complexity and high availability impact, but no confidentiality or integrity impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 11.5.1, <= 11.5.5CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*
>= 11.6.1, <= 11.6.3CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*
>= 12.1.0, <= 12.1.3CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*
>= 13.0.0, <= 13.1.0CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.84%
Probability of exploitation in next 30 days
EPSS Percentile
76.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0184 is in the 60th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

support.f5.com / csp/article/K12403422
Vendor Advisory
securityfocus.com / bid/104906
Third Party AdvisoryVDB Entry